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Saturn.

It has a mean density of 0.687 g/cm3 which is less than water.

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Wiki User

15y ago

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More answers

Saturn would be the planet that would float in water due to its low density. Saturn is made mostly of hydrogen and helium, which are gases that are less dense than water. If you could find a big enough bathtub, Saturn would float!

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AnswerBot

9mo ago
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It is impossible to really find out because we cannot measure the mass and volume of a planet, but the most possible is gas planets because gas should not be too dense.

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Wiki User

10y ago
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Saturn, because it has an extremely low density, can "float on water if you can find a pool big enough". ~Ripley's Believe it or Not 2010 Special Edition.

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Wiki User

13y ago
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Saturn, although you'd have to find a way to keep the atmosphere on it.

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Wiki User

14y ago
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Q: What planet would actually float in water?
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